Samsung SV-A130B Service Manual page 29

Alignment and Adjustment
5-3-2 RF AGC Adjustment
Step Adjustment Item
1. Mode and input signal/
alignment tape
2. Test point and ADJ. part
3. Result and Remarks
5-3-2 (a) ADJUSTMENT PROCEDURES
1. ÒE-EÓ (stop mode), RF signal.
2. TP07 and VR401.
3. Apply PAL color bar signal to the video input
terminal of the TV channel generator and set
channel selector to CH 2 (48.25MHz).
4. Adjust the point signal level so that the output of
attenuator is 70dBu.
5. Apply the output of attenuator to the ANT IN
terminal of VCR.
6. Set the channel of VCR to CH 2.
7. Connect DC voltmeter to TP07.
8. Adjust VR401 for DC 3.7 ± 0.1V.
VR401
5-6
ADJ. point
Main PCB (Component side)
* Composition for RF AGC adjustment
PAL Color bar
signal out
TV CH Generator
CH 2 (48.25MHz)
ANT IN
VCR
TP07
PAL Pattern
generator
Attenuator
70dBu
DC Voltmeter
Samsung Electronics